Figure 17. Experimental design to demonstrate primary, reflective, and second-order Poisson patterns based on the arcs of secondary, edge pulsons.

A.Primary Poisson pattern. A source, aperture, disc, and observation screen are centered along the same axis. The planes of the opaque barrier containing the aperture, disc-1, and the observation screen are rendered parallel. A primary source is manipulated to create a redundant pulson pattern (effective point source) by utilization of a small circular aperture. See Fig. 13. This arrangement allows excitations of diametrically-opposed macrons pairs in the edge (points x and y) of disc-1 that produce coherent arc segments of pulsons. These secondary arc segments interact as illustrated in Fig. 6 to create a primary Poisson pattern on the observation screen.

B.Reflective Poisson pattern. Disc-2 of equal or smaller size to disc-1 is inserted between disc-1 and the observation screen which is moved farther downstream. Under appropriate geometry, coherent, diametrically-opposed signals are created at edge positions of disc-2 (points a and b) by the comparable, secondary signals originating from the edges of disc-1(points x and y). The secondary signals from disc-1 would also create a Poisson pattern on the front side of disc-2 as illustrated for 17-A at the detection screen. (The entire sequence of pulson fronts from edge of disc-1 to disc-2 is not shown.) The pulsons from the edge of disc-2 would create a Poisson pattern on the downstream screen and a reflective Poisson pattern on the back of disc-1. The edge of disc 2 is positioned so that it coincides with a constructive interference zone within the Poisson pattern from disc 1. Similar patterns should be obtained if the source were adjusted such that pulson fronts were parallel at disc-1 and disc-2 was of larger diameter than disc-1. In the latter arrangement the secondary signals of disc-2 would be derived from the interactions with the primary signal and the secondary signals of disc-1. See Fig. 5.

C.Second order Poisson pattern. Disc-2 of 17-B is replaced by an opaque barrier with a small aperture. In this situation the edges of the aperture are excited by the secondary pulsons from the edges of disc-1 exclusive of the primary signal. The secondary pulsons arising at the edges of the aperture generate a second order Poisson pattern on the central axis at the observation screen. Shown is a schematic diagram of the experimental setup utilized by Kelly et al to produce a second-order Poisson pattern. This arrangement should allow for the creation of a reflective Poisson pattern originating from the edge of the circular aperture.